Aiwa HV-MC90 Service Manual page 19

BLOCK DIAGRAM - 2/4 (VIDEO SECTION)
¥ PB Mode
¥ REC Mode
3.58MHz
79 78
V.H.SW 81
CONTROL
TO
SYSTEM CONTROL
SECTION
V.ENV 84
HEAD1 HEAD2
PB-AMP
PB CH2 86
SP CH2
FROM
CYL.HEAD
PB-AMP
PB CH1 89
SP CH1
2M LPF
TRAP
IC301
HA118717F
VIDEO/AUDIO
PROCESSOR
35
IC301
HA118717F
46 C-CCD
VIDEO/AUDIO
CLOCK Drive
44
PROCESSOR
39
Y-CCD
42
6dB
52
AMP
D-V SYNC SQUEL CH
51
CLEAR
TO
SYNC
SYSTEM CONTROL
SECTION
FBC
Video ALC
VIDEO
AGC
1
ATT ATT ATT
-10dB -10dB -10dB
31 30 28 29 21
JK3M01
VIDEO
+
IN
TO
SYSTEM CONTROL
SECTION
X302 X301
4.43MHz
73 71 75 63 62 69 60 58
X-tal Serial Cont
VCO/OSC interface
Main
VCA CCD LPF
Conv2
CTL Trap
ACC C LPF DEALY
fh Trap
L- DET
HIFI Trap
Main
Conv1
DEMO Main NL
FM AGC P.EQ G.EQ D LIM Y LPF
De-eMPH
S LPF De-Empf
22 13 14 18
60
58 69
VCA
L-DET
(-4dB)
APC/ACC
DET
Main CCD
C-LPF
Conv2 LPF
ACC SPF
Main
C-LPF
Conv2
FBC Main FM
D.E. NL Emph
ALC Emph
MOD
f/0DEV
Adjst
Y-LPF
YNR
AGC DET SYNC
SEP
LPF CLAMP CLAMP
26 24 23 18 19 50 22 20 14 13
TO
SYSTEM CONTROL
SECTION
-19-
55 54 35
C-CCD
46
CLOCK Drive
44
39
Y-CCD
42
MIX
52
AMP
APC/ACC
DET
SQUEL CH
51
BPF BD C.K
CLEAR
SYNC
CLAMP
SYNC SEP 50
Sharpness FBC
56
YNR NC
Video ALC
CONTROL
CLAMP
LPF LPF
19 23 24 26 21
TO
SYSTEM CONTROL
SECTION
X302 X301
3.58MHz 4.43MHz
75
62 63 71 73
CONTROL 81
Serial Cont X-tal
interface VCO/OSC
HEAD1 HEAD2
f0=1.68M
B.E MIX REC
LPF
C.K ATT Trap
REC-AMP
87
SP CH2
LPF HPF TRAP VCA
REC-AMP
88
SP CH1
15
MD3M1
(MODULATOR)
5 V.IN
JK3M01
VIDEO
OUT
D-V SYNC
TO
SYSTEM CONTROL
SECTION
C-SYNC
:PB VIDEO SIGNAL
:PB CHROMA SIGNAL
:PB Y SIGNAL
TO
V.H.SW SYSTEM CONTROL
SECTION
TO
REC
CYL.HEAD
:REC VIDEO SIGNAL
:REC CHROMA SIGNAL
:REC Y SIGNAL